An anti-overheavy metal hook

Abstract

The present invention relates to the technical field of hooks, and particularly relates to an anti-overweight metal hook, comprising: a hook, which is composed of a connecting plate, a cross bar and a hook; the side wall of the cross bar is rotatably connected to the lower end of the connecting plate, and the side wall of the cross bar is fixedly connected to the upper end of the hook; a falling-off mechanism, which includes a fixed frame, the side wall of the connecting plate is hermetically and slidably connected to the inner bottom of the fixed frame, a first sealed box is fixedly connected to the lower end of the fixed frame close to the cross bar, and a threaded rod is threadedly connected to the inner bottom of the first sealed box. When the weight of the material exceeds the load weight of the hook in the present invention, at this time, the threaded cylinder drives the vertical rod and the rectangular rod to rotate forward through the first bevel gear and the second bevel gear, drives the threaded rod to rotate forward, so that the threaded rod rotates and separates from the threaded hole, and the first T-shaped plate moves and separates from the clamping groove. At this time, the hook directly rotates downward under the action of gravity, so that the hook cannot lift the material.

Description

Technical Field

[0001] The present invention relates to the technical field of hooks, and particularly relates to an anti-overweight metal hook. Background Art

[0002] A crane refers to a multi-action lifting machine that vertically lifts and horizontally transports heavy objects within a certain range. When the crane lifts and transports materials, it generally uses a metal hook to lift.

[0003] Since the metal hook has a certain load-bearing weight, in order to ensure the safety of the materials after being lifted by the metal hook, it is necessary to monitor the lifting weight of the materials. Although in the prior art, a pressure sensor and an alarm are provided on the metal hook, when the lifting weight of the materials is overweight, the alarm will sound at this time to remind the staff to reduce the weight of the materials. However, in the actual operation process, the staff often has a fluke mentality. In the case of overweight materials, they still carry out the lifting operation of the materials, resulting in a large load weight on the metal hook, which is likely to cause the deformation or even fracture of the metal hook, leading to the materials falling from a high altitude and having a low safety factor. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose an anti-overweight metal hook.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An anti-overweight metal hook, comprising:

[0007] A hook, the hook is composed of a connecting plate, a cross bar and a hook. The side wall of the cross bar is rotatably connected to the lower end of the connecting plate, and the side wall of the cross bar is fixedly connected to the upper end of the hook.

[0008] A detachment mechanism, the detachment mechanism includes a fixed frame. The side wall of the connecting plate is hermetically slidably connected to the inner bottom of the fixed frame. A first sealed box is fixedly connected to the lower end of the fixed frame close to the cross bar. A threaded rod is threadedly connected to the inner bottom of the first sealed box. The side wall of the threaded rod is threadedly connected to the side wall of the connecting plate. A threaded hole is opened at the upper end of the hook. The side wall of the threaded rod is threadedly connected to the inner wall of the threaded hole. A first plate is fixedly connected to the inner wall of the first sealed box. A vertical rod is rotatably connected to the side wall of the first plate. A rectangular rod is fixedly connected to the lower end of the vertical rod. A square groove is opened at the upper end of the threaded rod. The side wall of the rectangular rod is fitted to the inner wall of the square groove.

[0009] Preferably, a protection mechanism is provided on the connecting plate. The protection mechanism includes a protection plate rotatably connected to the side wall of the connecting plate through a rotating shaft. The lower end of the protection plate is elastically connected to the side wall of the connecting plate through a plurality of first springs. A baffle is fixedly connected to the side wall of the connecting plate below the protection plate.

[0010] Preferably, an extrusion mechanism is provided on the fixed frame. The extrusion mechanism includes a second sealing box fixedly connected to the lower end of the fixed frame away from the cross bar. A second plate is hermetically and slidably connected to the inner wall of the second sealing box. The lower end of the second plate is elastically connected to the bottom inside the second sealing box through a plurality of second springs. A sliding plate is fixedly connected to the lower end of the second plate. The lower end of the sliding plate penetrates through the bottom inside the second sealing box. The lower end of the sliding plate is rotatably connected to the upper end of the protection plate through a rotating plate.

[0011] Preferably, a third plate is hermetically and slidably connected to the inner wall of the fixed frame. The lower end of the third plate is elastically connected to the bottom inside the fixed frame through a plurality of third springs. The lower end of the third plate is fixedly connected to the upper end of the connecting plate. Hydraulic oil is provided inside the fixed frame. The bottom inside the fixed frame is communicated with the top inside the second sealing box through a first pipe.

[0012] Preferably, a driving mechanism is provided inside the first sealing box. The driving mechanism includes a fourth plate hermetically and slidably connected to the inner wall of the first sealing box. The side wall of the fourth plate away from the threaded rod is elastically connected to the inner wall of the first sealing box through a plurality of fourth springs. A threaded cylinder is rotatably connected to the side wall of the first sealing box close to the threaded rod. A rifled rod is threadedly connected to the inner wall of the threaded cylinder. One end of the rifled rod away from the threaded cylinder is fixedly connected to the side wall of the fourth plate.

[0013] Preferably, a first bevel gear is fixedly connected to the side wall of the threaded cylinder. A second bevel gear is fixedly connected to the upper end of the vertical rod. The first bevel gear meshes with the second bevel gear.

[0014] Preferably, the inner wall of the second sealing box above the second plate is communicated with the inner wall of the first sealing box close to the fourth spring through a one-way oil inlet pipe. The inner wall of the second sealing box above the second plate is communicated with the inner wall of the first sealing box close to the fourth spring through a return pipe. A pressure valve is installed in the one-way oil inlet pipe. A manual regulating valve is installed in the return pipe.

[0015] Preferably, a clamping mechanism is provided on the cross bar. The clamping mechanism includes a groove opened on the side wall of the cross bar close to the connecting plate. A first T-shaped plate is hermetically and slidably connected to the inner wall of the groove. A clamping groove is opened on the side wall at the connection between the connecting plate and the cross bar. The side wall of the clamping groove fits with the side wall of the first T-shaped plate.

[0016] Preferably, an oil pumping frame is fixedly connected to the inner side wall of the first sealing box close to the fourth spring. A second T-shaped plate is hermetically and slidably connected to the inner wall of the oil pumping frame. The side wall of the second T-shaped plate is fixedly connected to the side wall of the fourth plate. Hydraulic oil is provided inside the oil pumping frame. The inner wall of the oil pumping frame is communicated with the inner wall of the groove through a second pipe.

[0017] Preferably, a mounting plate is fixedly connected to the upper end of the fixed frame. A plurality of mounting holes are opened on the side wall of the mounting plate.

[0018] Compared with the existing technology, the advantages of the present invention are as follows:

[0019] 1. A protection mechanism is provided. After the hook lifts the material, at this time, the hook and the connecting plate drive the third plate to move downward under the action of the weight of the material, squeezing the hydraulic oil in the fixed frame into the second sealed box through the first pipe, and then driving the second plate to move downward, so that the second plate drives the protection plate to rotate downward through the sliding plate and the rotating plate, closing the upper part of the hook to prevent the material from separating from the hook during the lifting process.

[0020] 2. A detachment mechanism, a driving mechanism and a clamping mechanism are provided. When the weight of the material exceeds the load weight of the hook, at this time, the threaded cylinder drives the vertical rod and the rectangular rod to rotate forward through the first bevel gear and the second bevel gear, driving the threaded rod to rotate forward, so that the threaded rod rotates and separates from the threaded hole, and the first T-shaped plate moves and separates from the clamping groove. At this time, the hook rotates directly downward under the action of gravity, so that the hook cannot lift the material, avoiding the situation in the existing technology that workers often take chances and still carry out the hoisting operation of the material when the material is overweight, resulting in a large load weight on the metal hook, which is likely to cause deformation or even fracture of the metal hook, leading to the material falling from a high altitude and having a low safety factor.

[0021] 3. A clamping mechanism is provided, so that the threaded rod rotates and is threadedly connected with the threaded hole. After reconnecting the connecting plate and the hook, at this time, the first T-shaped plate can be inserted into the clamping groove to increase the connection stability between the connecting plate and the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a superheavy-proof metal hook proposed by the present invention;

[0023] Figure 2 is Figure 1 the vertical sectional structural diagram of;

[0024] Figure 3 is Figure 2 the enlarged structural diagram of part A in;

[0025] Figure 4 is Figure 1 the structural diagram after the connecting plate, the cross bar and the hook are separated in;

[0026] Figure 5 is Figure 1 the horizontal sectional structural diagram of the one-way oil inlet pipe and the return pipe in;

[0027] Figure 6 is Figure 5 the enlarged structural diagram of part B in;

[0028] Figure 7 is Figure 2 an enlarged schematic view of the structure at position C in

[0029] Figure 8 is Figure 4 a bottom-up schematic view of the structure of

[0030] Figure 9 is Figure 8 an enlarged schematic view of the structure at position D in

[0031] In the figure: 1, connecting plate; 2, cross bar; 3, hook; 4, fixed frame; 5, first sealing box; 6, threaded rod; 7, threaded hole; 8, first plate; 9, vertical rod; 10, rectangular rod; 11, square groove; 12, protective plate; 13, first spring; 14, baffle; 15, second sealing box; 16, second plate; 17, second spring; 18, sliding plate; 19, rotating plate; 20, third plate; 21, third spring; 22, first pipe; 23, fourth plate; 24, fourth spring; 25, threaded cylinder; 26, rifled rod; 27, first bevel gear; 28, second bevel gear; 29, one-way oil inlet pipe; 30, return pipe; 31, pressure valve; 32, manual regulating valve; 33, groove; 34, first T-shaped plate; 35, clamping groove; 36, oil pumping frame; 37, second T-shaped plate; 38, second pipe; 39, mounting plate. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to Figure 1 - Figure 9 , an anti-heavy metal hook includes a hook, which is composed of a connecting plate 1, a cross bar 2 and a hook 3. The side wall of the cross bar 2 is rotatably connected to the lower end of the connecting plate 1, and the side wall of the cross bar 2 is fixedly connected to the upper end of the hook 3.

[0034] A detachment mechanism, the detachment mechanism includes a fixed frame 4. The side wall of the connecting plate 1 is hermetically and slidably connected to the inner bottom of the fixed frame 4. The upper end of the fixed frame 4 is fixedly connected with a mounting plate 39, and a plurality of mounting holes are provided on the side wall of the mounting plate 39. The anti-heavy metal hook can be connected to an external crane through the mounting plate 39.

[0035] The lower end of the fixed frame 4 close to the cross bar 2 is fixedly connected with a first sealing box 5. The inner bottom of the first sealing box 5 is threadedly connected with a threaded rod 6, and the side wall of the threaded rod 6 is threadedly connected with the side wall of the connecting plate 1. A threaded hole 7 is provided at the upper end of the hook 3 (asFigure 4 As shown, the side wall of the threaded rod 6 is threadedly connected to the inner wall of the threaded hole 7. The inner wall of the first sealing box 5 is fixedly connected with a first plate 8. The side wall of the first plate 8 is rotatably connected with a vertical rod 9. The lower end of the vertical rod 9 is fixedly connected with a rectangular rod 10. A square groove 11 is opened at the upper end of the threaded rod 6. The side wall of the rectangular rod 10 is in contact with the inner wall of the square groove 11 (as Figure 3 shown).

[0036] When the side wall of the threaded rod 6 is threadedly connected to the inner wall of the threaded hole 7, at this time, the lower end of the connecting plate 1 and the upper end of the hook 3 are in contact with each other, forming a complete metal hook.

[0037] A protection mechanism is provided on the connecting plate 1. The protection mechanism includes a protection plate 12 rotatably connected to the side wall of the connecting plate 1 through a rotating shaft. The lower end of the protection plate 12 is elastically connected to the side wall of the connecting plate 1 through a plurality of first springs 13. A baffle 14 is fixedly connected to the side wall of the connecting plate 1 below the protection plate 12 (as Figure 2 shown).

[0038] An extrusion mechanism is provided on the fixed frame 4. The extrusion mechanism includes a second sealing box 15 fixedly connected to the fixed frame 4 away from the lower end of the cross bar 2. The inner wall of the second sealing box 15 is hermetically slidably connected with a second plate 16. The lower end of the second plate 16 is elastically connected to the inner bottom of the second sealing box 15 through a plurality of second springs 17. The lower end of the second plate 16 is fixedly connected with a sliding plate 18. The lower end of the sliding plate 18 penetrates through the inner bottom of the second sealing box 15. The lower end of the sliding plate 18 is rotatably connected to the upper end of the protection plate 12 through a rotating plate 19.

[0039] The inner wall of the fixed frame 4 is hermetically slidably connected with a third plate 20. The lower end of the third plate 20 is elastically connected to the inner bottom of the fixed frame 4 through a plurality of third springs 21. The lower end of the third plate 20 is fixedly connected to the upper end of the connecting plate 1. Hydraulic oil is provided in the fixed frame 4. The inner bottom of the fixed frame 4 is communicated with the inner top of the second sealing box 15 through a first pipe 22.

[0040] After the material is lifted by the hook 3, at this time, the hook 3 and the connecting plate 1 drive the third plate 20 to move downward under the action of the weight of the material, squeezing the hydraulic oil in the fixed frame 4 into the second sealing box 15 through the first pipe 22, thereby driving the second plate 16 to move downward, so that the second plate 16 drives the protection plate 12 to rotate downward through the sliding plate 18 and the rotating plate 19, closing the upper part of the hook 3 to prevent the material from separating from the hook 3 during the lifting process.

[0041] A driving mechanism is provided in the first sealing box 5. The driving mechanism includes a fourth plate 23 hermetically slidably connected to the inner wall of the first sealing box 5. The side wall of the fourth plate 23 away from the threaded rod 6 is elastically connected to the inner wall of the first sealing box 5 through a plurality of fourth springs 24. The side wall of the first sealing box 5 close to the threaded rod 6 is rotatably connected with a threaded cylinder 25. The inner wall of the threaded cylinder 25 is threadedly connected with a rifled rod 26 (as Figure 3As shown in FIG. 1 ), one end of the rifle rod 26 away from the threaded tube 25 is fixedly connected to the side wall of the fourth plate 23.

[0042] A first bevel gear 27 is fixedly connected to the side wall of the threaded cylinder 25 , and a second bevel gear 28 is fixedly connected to the upper end of the vertical rod 9 . The first bevel gear 27 and the second bevel gear 28 are meshed with each other.

[0043] The inner wall of the second sealed box 15 located above the second plate 16 is connected to the inner wall of the first sealed box 5 near the fourth spring 24 through a one-way oil inlet pipe 29, and the inner wall of the second sealed box 15 located above the second plate 16 is connected to the inner wall of the first sealed box 5 near the fourth spring 24 through a return pipe 30 (as shown in FIG. Figure 1 and Figure 5 As shown in FIG. 1 ), a pressure valve 31 is installed in the one-way oil inlet pipe 29, and a manual regulating valve 32 is installed in the return pipe 30 (as shown in FIG. Figure 6 as shown).

[0044] Furthermore, the one-way oil inlet pipe 29 only allows the hydraulic oil to enter the first sealed box 5 from the second sealed box 15. Meanwhile, during the normal use of the hook 3, the return pipe 30 is closed.

[0045] The hydraulic oil in the fixed frame 4 is squeezed into the second sealed box 15 through the first pipe 22. At this time, the protective plate 12 rotates downward to fit the side wall of the baffle 14. When the weight of the material does not exceed the load weight of the hook 3, the extrusion force on the hydraulic oil does not reach the pressure value of the pressure valve 31. At this time, the hydraulic oil in the second sealed box 15 will not flow out through the one-way oil inlet pipe 29, and the connection plate 1 and the hook 3 will not be separated.

[0046] When the weight of the material exceeds the load weight of the hook 3, the extrusion force on the hydraulic oil reaches the pressure value of the pressure valve 31. At this time, the hydraulic oil in the second sealed box 15 will flow into the first sealed box 5 through the one-way oil inlet pipe 29, driving the fourth plate 23 to move leftward (such as Figure 3 As shown), the rifle rod 26 is driven to enter the threaded barrel 25, so that the threaded barrel 25 rotates. At this time, the threaded barrel 25 drives the vertical rod 9 and the rectangular rod 10 to rotate forwardly through the first bevel gear 27 and the second bevel gear 28, and drives the threaded rod 6 to rotate forwardly. At this time, the connection plate 1 and the first sealing box 5 are fixed in position, and the threaded rod 6 rotates and moves upward in the connection plate 1 and the first sealing box 5, so that the threaded rod 6 rotates and separates from the threaded hole 7.

[0047] The cross bar 2 is provided with a clamping mechanism, which includes a groove 33 (such as Figure 7 As shown, the inner wall of the groove 33 is sealed and slidably connected with a first T-shaped plate 34, and a slot 35 is provided on the side wall where the connecting plate 1 and the cross bar 2 are connected (as shown in FIG. Figure 9As shown in the figure, the inner wall of the card slot 35 fits against the side wall of the first T-shaped plate 34.

[0048] On the inner side wall of the first sealing box 5 close to the fourth spring 24, a pump oil frame 36 is fixedly connected. A second T-shaped plate 37 is hermetically and slidably connected to the inner wall of the pump oil frame 36. The side wall of the second T-shaped plate 37 is fixedly connected to the side wall of the fourth plate 23. Hydraulic oil is provided inside the pump oil frame 36. The inner wall of the pump oil frame 36 is communicated with the inner wall of the groove 33 through a second pipe 38.

[0049] When the fourth plate 23 moves to the left (as Figure 3 shown), at this time the second T-shaped plate 37 moves to the left synchronously (as Figure 3 shown), and then the pump oil frame 36 will absorb hydraulic oil from the groove 33 through the second pipe 38, causing the first T-shaped plate 34 to move and separate from the card slot 35. Then, after the threaded rod 6 rotates and separates from the threaded hole 7 subsequently, at this time the hook 3 directly rotates downward under the action of gravity, so that the hook 3 cannot lift the material, avoiding the situation in the prior art where workers often take chances and still carry out the hoisting operation of the material when the material is overweight, resulting in a large load weight on the metal hook, which is likely to cause deformation or even fracture of the metal hook, leading to the material falling from a high altitude and having a low safety factor.

[0050] When the position of the hook 3 needs to be restored subsequently, at this time the worker first rotates the hook 3 so that the upper end of the hook 3 fits against the lower end of the connecting plate 1. Then, the manual regulating valve 32 is rotated to open the return pipe 30. At this time, under the elastic force of multiple first springs 13, second springs 17, third springs 21 and fourth springs 24, all the hydraulic oil located inside the first sealing box 5 will flow out through the return pipe 30, causing the fourth plate 23 to return to its initial position. At this time, the threaded cylinder 25 will drive the vertical rod 9 and the rectangular rod 10 to rotate in the reverse direction through the first bevel gear 27 and the second bevel gear 28, driving the threaded rod 6 to rotate in the reverse direction. The threaded rod 6 rotates and moves downward inside the connecting plate 1 and the first sealing box 5, causing the threaded rod 6 to rotate and be threadedly connected to the threaded hole 7, reconnecting between the connecting plate 1 and the hook 3 for subsequent use. At this time, the first T-shaped plate 34 is aligned with the card slot 35;

[0051] At this time, the second T-shaped plate 37 will synchronously return to its initial position, squeezing the hydraulic oil inside the pump oil frame 36 into the groove 33 through the second pipe 38. At this time, the first T-shaped plate 34 is inserted into the card slot 35, increasing the connection stability between the connecting plate 1 and the hook 3.

[0052] During the use of this anti-overweight metal hook, this anti-overweight metal hook can be connected to an external crane through the mounting plate 39;

[0053] After the material is hoisted on the hook 3, the hook 3 and the connecting plate 1 drive the third plate 20 to move downward under the action of the weight of the material, and squeeze the hydraulic oil in the fixed frame 4 into the second sealing box 15 through the first pipe 22, thereby driving the second plate 16 to move downward, so that the second plate 16 drives the protective plate 12 to rotate downward through the slide plate 18 and the rotating plate 19, and the upper part of the hook 3 is sealed to prevent the material from being separated from the hook 3 during the hoisting process, and at this time the protective plate 12 will rotate downward to fit the side wall of the baffle 14;

[0054] When the weight of the material does not exceed the load weight of the hook 3, the extrusion force on the hydraulic oil does not reach the pressure value of the pressure valve 31, and the hydraulic oil in the second sealing box 15 will not flow out through the one-way oil inlet pipe 29, and the connection plate 1 and the hook 3 will not separate;

[0055] When the weight of the material exceeds the load weight of the hook 3, the extrusion force on the hydraulic oil reaches the pressure value of the pressure valve 31. At this time, the hydraulic oil in the second sealed box 15 will flow into the first sealed box 5 through the one-way oil inlet pipe 29, driving the fourth plate 23 to move leftward (such as Figure 3 As shown), the rifle rod 26 is driven to enter the threaded barrel 25, so that the threaded barrel 25 rotates. At this time, the threaded barrel 25 drives the vertical rod 9 and the rectangular rod 10 to rotate forwardly through the first bevel gear 27 and the second bevel gear 28, and drives the threaded rod 6 to rotate forwardly. The threaded rod 6 rotates and moves upward in the connecting plate 1 and the first sealing box 5, so that the threaded rod 6 rotates and separates from the threaded hole 7;

[0056] At the same time, when the fourth plate 23 moves to the left (such as Figure 3 As shown), at this time, the second T-shaped plate 37 moves synchronously to the left (as shown Figure 3 As shown), the oil pump frame 36 absorbs hydraulic oil from the groove 33 through the second pipe 38, so that the first T-shaped plate 34 moves and separates from the slot 35, and then after the threaded rod 6 rotates and separates from the threaded hole 7, the hook 3 directly rotates downward under the action of gravity, so that the hook 3 cannot lift the material, avoiding the workers in the prior art often taking chances and still lifting the material when the material is overweight, so that the load weight on the metal hook is large, which easily causes the metal hook to deform or even break, causing the material to fall from a high altitude, and the safety factor is low;

[0057] When it is necessary to restore the position of the hook 3 subsequently, at this time, the staff first rotates the hook 3 so that the upper end of the hook 3 fits against the lower end of the connecting plate 1. Subsequently, the manual regulating valve 32 is rotated (it should be noted that before rotating the manual regulating valve 32, the second plate 16 is fully reset, the third plate 20 is not fully reset, and the position of the fourth plate 23 remains unchanged), and the return pipe 30 is opened. At this time, under the elastic force of a plurality of first springs 13, second springs 17, third springs 21 and fourth springs 24, the hydraulic oil in the first sealing box 5 will all flow out through the return pipe 30, causing the fourth plate 23 to return to its initial position. At this time, the threaded cylinder 25 will drive the vertical rod 9 and the rectangular rod 10 to rotate in the reverse direction through the first bevel gear 27 and the second bevel gear 28, driving the threaded rod 6 to rotate in the reverse direction. The threaded rod 6 rotates and moves downward inside the connecting plate 1 and the first sealing box 5, so that the threaded rod 6 rotates and is threadedly connected to the threaded hole 7, reconnecting between the connecting plate 1 and the hook 3 for subsequent use. At this time, the first T-shaped plate 34 is aligned with the card slot 35;

[0058] At this time, the second T-shaped plate 37 will synchronously return to its initial position, squeezing the hydraulic oil in the oil pumping frame 36 into the groove 33 through the second pipe 38. At this time, the first T-shaped plate 34 is inserted into the card slot 35, increasing the connection stability between the connecting plate 1 and the hook 3.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An anti-overweight metal hook, characterized in that: include: The hook is composed of a connecting plate, a cross bar and a curved hook, the side wall of the cross bar is rotatably connected to the lower end of the connecting plate, and the side wall of the cross bar is fixedly connected to the upper end of the curved hook; The falling mechanism comprises a fixed frame, a side wall of a connecting plate is sealingly and slidingly connected to the bottom of the fixed frame, a first sealed box is fixedly connected to the lower end of the fixed frame near the cross bar, a threaded rod is threadedly connected to the bottom of the first sealed box, a side wall of the threaded rod is threadedly connected to the side wall of the connecting plate, a threaded hole is provided at the upper end of the hook, the side wall of the threaded rod is threadedly connected to the inner wall of the threaded hole, a first plate is fixedly connected to the inner wall of the first sealed box, a vertical rod is rotatably connected to the side wall of the first plate, a rectangular rod is fixedly connected to the lower end of the vertical rod, a square groove is provided at the upper end of the threaded rod, and the side wall of the rectangular rod fits the inner wall of the square groove; The crossbar is provided with a clamping mechanism, which includes a groove provided on the crossbar near the side wall of the connecting plate, the inner wall of the groove is sealingly and slidably connected with the first T-shaped plate, and a clamping groove is provided on the side wall where the connecting plate and the crossbar are connected, and the inner wall of the clamping groove is in contact with the side wall of the first T-shaped plate; The fixed frame is provided with an extrusion mechanism, which includes a second sealing box fixedly connected to the fixed frame away from the lower end of the crossbar, the inner wall of the second sealing box is sealingly and slidably connected with a second plate, and the lower end of the second plate is elastically connected to the bottom of the second sealing box through a plurality of second springs; The inner wall of the fixed frame is sealed and slidably connected with a third plate, the lower end of the third plate is elastically connected to the bottom of the fixed frame through a plurality of third springs, the lower end of the third plate is fixedly connected to the upper end of the connecting plate, hydraulic oil is provided in the fixed frame, and the bottom of the fixed frame is connected to the top of the second sealed box through the first pipe; A driving mechanism is provided in the first sealed box, the driving mechanism comprising a fourth plate sealingly and slidably connected to the inner wall of the first sealed box, the side wall of the fourth plate away from the threaded rod is elastically connected to the inner wall of the first sealed box through a plurality of fourth springs, the side wall of the first sealed box close to the threaded rod is rotatably connected to a threaded barrel, the inner wall of the threaded barrel is threadedly connected to a rifle rod, and one end of the rifle rod away from the threaded barrel is fixedly connected to the side wall of the fourth plate; The side wall of the threaded cylinder is fixedly connected with a first bevel gear, the upper end of the vertical rod is fixedly connected with a second bevel gear, and the first bevel gear is meshed with the second bevel gear; The inner wall of the second sealed box located above the second plate is connected to the inner wall of the first sealed box near the fourth spring through a one-way oil inlet pipe, and the inner wall of the second sealed box located above the second plate is connected to the inner wall of the first sealed box near the fourth spring through a return pipe, a pressure valve is installed in the one-way oil inlet pipe, and a manual regulating valve is installed in the return pipe; The first sealing box is fixedly connected to an oil pump frame on the inner wall near the fourth spring, and the inner wall of the oil pump frame is sealingly and slidingly connected to a second T-shaped plate, and the side wall of the second T-shaped plate is fixedly connected to the side wall of the fourth plate. Hydraulic oil is provided in the oil pump frame, and the inner wall of the oil pump frame is connected to the inner wall of the groove through a second pipe.

2. The anti-overweight metal hook according to claim 1, characterized in that: A protective mechanism is provided on the connecting plate, which includes a protective plate rotatably connected to the side wall of the connecting plate through a rotating shaft, the lower end of the protective plate is elastically connected to the side wall of the connecting plate through multiple first springs, and the side wall of the connecting plate located below the protective plate is fixedly connected with a baffle.

3. The anti-overweight metal hook according to claim 2, characterized in that: The lower end of the second plate is fixedly connected with a slide plate, the lower end of the slide plate passes through the bottom of the second sealed box, and the lower end of the slide plate is rotatably connected with the upper end of the protection plate through a rotating plate.

4. The anti-overweight metal hook according to claim 1, characterized in that: The upper end of the fixing frame is fixedly connected with a mounting plate, and a plurality of mounting holes are provided on the side wall of the mounting plate.

Images